[Request]: share_plus refactor

[miquelbeltran]

Plugin

share_plus

Use case

Currently, the SharePlus class entry point has three major problems:

• Functionality to share content is divided in three methods, this difficult implementing new features and leads to code duplication across these three.
• Share functions have parameter creep, as functionality grows and more optional/named parameters are added. It is not clear what are all parameters doing (e.g. subject)
• The SharePlus class exposes static methods, and it is not instantiable, this makes mocking/faking more difficult.

Proposal

1. Unify the three methods into one.
2. Create a ShareParams class with multiple share parameters (this class should be serializable so it can be passed to the native layer as well), and document those parameters.
3. Make SharePlus instantiable and expose a singleton instance, so devs can choose how to use it.
4. Expose old static methods with @deprecated annotation, so public API remains the same.

Related issues

• [Request]: (share_plus) EXTRA_TITLE in share Intent on Android #3307
• [Request]: (share_plus) Add platform exclusion functionality for iOS. #3377
• feat(share_plus): support rich preview on the share sheet #3372
• feat(share_plus): Added excludedActivityTypes support for the iOS platform. #3376